Dozens of industry and business groups, including the U.S. Chamber of Commerce, back the Cybersecurity Information Sharing Act (CISA), saying it would help encourage companies and the government to share information that might help thwart high-profile cyber attacks.

But many privacy activists and a few lawmakers, including Republican Senator Rand Paul and Democratic Senator Ron Wyden, vehemently oppose it. Several big tech companies also have come out against the measure, arguing that it fails to protect users‘ privacy and does too little to prevent cyber attacks.